Add maximum timestamp to the payload. am: f8527ada7b  -s ours am: 962bfa3b27  -s ours am: ace31a8858  -s ours am: 58183c9d7a  -s ours am: 15ad0e9ec9  -s ours
am: 0ae64f6c59  -s ours

Change-Id: I93a36da1fa1187188a278f1ac3b02d5d28393f9f